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F. B. HERZOG 8 8. S. WHEELER.

ELECTRIC SIGNALING APPARATUS- ted Dec. 22, 1896'.

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P. B. HERZOG & S. S. WHEELER.

ELECTRIC SIGNALING APPARATUS.

No. 573,592. Patented De0.-'ZZ, 1896.

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flail/ UNITED STATES PATENT ()FFICE.

FELIX BENEDICT I-IERZOG AND SOHUYLER SKAATS WHEELER, OF NEW YORK, N. Y.;SAID WHEELER ASSIGNOR TO SAID HERZOG.

ELECTRIC SIGNALING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 573,592, dated December22, 1896. Application filedJanuary 29, 1886. SerialNo. 190,175. (Nomodel.)

when the wheel is rotated step by step by the HEEzoe and SoHUYLEE SKAATSWHEELER,

citizens of the United States, and residents of New York, in the countyof New York and State of New York, have invented certain new and usefulImprovements in Electric Signaling Apparatus, (Case No. 30,) of whichthe following is a specification.

This invention relates to electrical signaling generally, and moreparticularly to the cooperation of apparatus at a receiving-stationwhich is controlled from a sending-station by a transmitter adapted totransmit two or more separately variable signals at each transmission. 4

In the drawings, to which reference is hereby made, Figure 1 is a plan,and Fig. 2 an elevation, partly in section, of a type of transmitteradapted to the cooperation described. Fig. 3 is a plan, and Fig. 4 anelevation, of a type of the controlled apparatus at thereceiving-station.

It is to be understood that although a single distant station is shownany number may be connected with one receiving-station, either in seriesor multiple or in oombin ations of these arrangements.

The transmitter may be of any suitable variety, the one describedbeingtypical only, and comprising the following elements, (shown inFigs. 1 and 2:) A shaft 18, suitably mounted in bearings 27 and 28,carries a head 24:, ending in sleeve 13, within which a rod-arm L may bepushed in and out. This arm ends in a spring-point M, of suflicientlength to touch raised plate N, which is insulated from the dial.Rigidly fixed to the shaft 18 is the star-wheel R, carrying extension Hand engaging with spring-click D, mounted on pin 30, fixed toratchet-wheel G. This wheel is loose upon the bushing 26,which is fixedto the shaft. The ratchet G cooperates with click B and spring 15 onarmature 16 and with engaging pawl E and its spring E, mounted on stud25, and the cooperation of the'parts is such that the rotation of thearm may take place in either direction by hand by means of knob M, andwhen rotated in one direction the wheel G will be held by the clicks, sothat it does not move with the shaft, whereas armaturethe arm is carriedalong. The dial is marked off in columns of spaces or suitableindications. Magnet A attracts armature 16, pivoted on insulated post23, and by gravity of knob F or stress of spring 5 the armature normallycauses its contact 22 to touch contact 3, mounted on a spring fixed toinsulated stud S. The parts are inclosed in case 9, and the lineconnections are by way of insulated posts 1 and 2 to lines 10 and 11.

The operation of the transmitter is as follows: The pointer having beenset over some indication and the circuit at any point in the line beingclosed to a distant station, the cur- I the click 13 causes wheel G, andhence thepointer, to move one step, and the circuit will also be againcompleted at 3 and 22. This operation continues until the extension H onwheel R has been rotated enough to cause it to touch spring 3, afterwhich a closed-circuit pause will occur, because, although 22 has beencarried away from the normal position of contact with spring 3, thisspring has followed the armature-contact 22, being pushed by theextension II. This condition continues until a break occurs elsewhere.In the organization of receiver as here typified this break will becaused at the receiving-station, whereupon the armature will fall backand in its usual manner will impel the wheel G one step, and thus freethe spring 3 as extension H passes beyond it. The relative adjustmentsof the retractile spring and of,

the spring 3 are such that the former will cause the wheel driven by itto overcome the erative end of extension H during each step of the wheelwill be large enough to cause its position of rest at the end of thestep which brings it into contact with the terminal 3 to be such thatthearm willhave passed beyond the point at which it can neutralize thisbackward motion of the armature. The resultant of the forces tending'toretract the armature if expressed by a line indicating their directionmay be opposed by the extension I-I, so that unless this werecompressible it would block the armature retraction, orthe axis ofresistance of this extension may make a smaller or a larger angle withthat line, according to the relative adjustments and centers of motionof the extension and of the armature and of the yieldingspring supportto the contact 3. In practice it i'sjvery simple to 7 getthe'relative'adj ust'nrent's of the'degrees of motion andofpower"andresistanc'e of the various parts, so that a very slightretractile force'wills'ufii'ceto cause the motion of 'thewheeltocontinue'after the break has been produced at thesending-station. Th'usthe step-by-step'm'otion'will continue until inthe courseo'f thefu'rther roratio'nthe pin M on the pointer will-havebeen carried i'n to'contact with the plate N, which is insulatedeverywhere "excepting at its connection "to branch 14, and thus to theoutgoing circuit by line 6.

The incoming circuit, after leaving the magnet, is connected by branch19 with a metal of the 'movement fr'ame, and through this with pointerM, and hence when this contacts'w'ith M the circuit is as follows:'ma'gnet A,-br'anch '19, movement-'arm'L, pointercontact M, plate N,branch 14 6, post 2, and out to-line, and this condition continues andin the type of transmitter shown marks the end ofa signal transmission.

Thep-late M is so shaped and placed with reference t'othein'dic'ationsin each column of the dial that, taking any 'columnas 'zero-or normal, an additional column (and hence step of the wheeh'therebeing as many steps as columns or multiples of the same) will haveto'be' passed over for each indication from the top of the column. Forinstance, the pointer 'is shown'at the topmost indication in a column.Then ifafter the-pause due tointerference'of H and 3 fo'urst'eps wouldhave been required to bring the pointer in contact with the outer end ofN it would take seven'ste'ps to bri'ng it in contact with the in-nerendof Nit thepointerhad been at rest on a fourth indication in itscolumninstead of on the first.

Thetransmitter just described thus transmits two'se'ries of currentdi'Eerent-iations, and these may be used to 'controlapparatus at"anotherstation, and one form of s'uch'app'a'ratuswill now be described.This consists of two progressive movements, hereinsho'wn 'asstep-by-step wheels, the "first of which com prises wheel '48 on shaft"57," and, coeperating in a well-known wa'ywith parts47 46 and the pawlcarried by'armature49 and retracted by spring 45 and moving around pivot44, causes the wheel to rotate, and with it the dial 50, indications ofwhich are arranged in columns and in general would. be so placed as toindicate corresponding indications to the transmitter, it beingunderstood that the dial may be arranged to indicate in the same or in areverse direction. The parts being in their normal position of rest,then if the transmitter has been set at some arbitrary signal and thecircuit is closed by key 37 at the receiving-station then for everyimpulse before the closure ,(in the transmitter) between H and 3 acorresponding impulse will be given by magnet 38 of thereceiving-station. It will be remembered that after the closure betweenH and 3 the transmitter remains at rest until a break occurssom'ewherein line, and'this break will be given 'by the operatormanually by'mea'nsof key 37 or 34, or, a'ccording 'to the ultimate object of'themechanism, it may begiven autom'aticallyas follows: The first attractionby magnet 38 *freed verge 42 of the springfimpelled'clocktrain 32 5841,-"an'd'thi's'train isso timed that,

"either uninterruptedl y or interrupted at each retraction-ofthearinature extension, it will run a length of'tim'e at least as greatas'that required to transmit 'the maximum number 'of'impulses in thefirst part of the transmis- "sion,and then the wheel 32 will bringitspin 31 in position to rock arm 00, so that the "switch-key 34will'leave the contact of the first branch 40 and will-also close thecontact of second branch 35, and'this switchingwill bring magnet incircuit, and then thesec- 0nd step by-step movement willbe operated asmany steps as the 'transmitterpro'duces between the pause due to contactof H and 3 and the final pause due to contact between M and N.

It-will'be seen that-by the organization de scribed the firstmovementatthe'receivingstation is directly controlledby the first partof the signal transmitted,'while the second part of the signal operatesthesecond'move ment of the receivin g apparatus. shown, the only localeifect of these progressive movements was that-the first one' rotatedthe dial in such fas'hio'nas to bring its 001- umns successively into agiven position, -'-and the second movementmoved'a pointer 51,30 that theproper one of the-several indications in'the selected column can bedesignatedby the pointer of the second movement, *but'we do not intendto 'c'onfine oursel'ves'tomerely "such-visual indications, but wishtoc'over, broadly, the apparatus 'when' a'd'apte'd and organized totransmit two separate variablesi'g As herein nals at one transmission,and at a receivingstation an apparatus comprising twoprogressively-moving elements, each controlled by a magnet the firstmagnet being controlled by the first part of the transmission, and thesecond magnet by the second part.

2. At a sending-station, a transmitter organized to transmit twoseparate variable signals at one transmission and at a receivingstationan apparatus comprising two progressively-moving elements eachcontrolled by a magnet, the first magnet being controlled by the firstpart of the transmission and the second magnet by the second part,together with a time-movement, acting to control the second element.

3. At a sending-station, a transmitter organized to transmit twoseparate variable signals at one transmission and at a receivingstationan apparatus comprising two step-bystep wheels, each controlled by amagnet, the first magnet being controlled by the first part of thetransmission and the second by the second part,

4. At a sending-station, a transmitter organized to transmit more thanone series of impulses at each transmission, and at a receiving-stationapparatus comprising a separate moving part and a separate magnet foreach of the parts of the signal transmitted.

5. A receivingestation apparatus comprising two wheels each controlledby its magnet,

the magnets being in branches of amain circuit, together with atime-switch controlling two of these branches.

6. At one station, means for producing two groups of impulses, togetherwith a controlled device as a magnet, and at a second station amechanism controlled by the first group and controlling the device atthe first station at the termination of the first group of impulses.

'7. A signal-transmitter comprising means for setting it to transmit twosets of signals,

a magnet controlling the second set, means controlling a pause after thetransmission of the first set, and at a second station, a switchcontrolling the subsequent energization of the

